| Literature DB >> 4886108 |
K L Herrmann, P E Halonen, J A Stewart, H L Casey, J M Ryan, A D Hall, K E Caswell.
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Year: 1969 PMID: 4886108 PMCID: PMC1226387 DOI: 10.2105/ajph.59.2.297
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572